tls: do not leak RSA key

function                                             old     new   delta
tls_handshake                                       1957    2059    +102

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

networking/tls.c

@@ -2168,6 +2168,7 @@ void FAST_FUNC tls_handshake(tls_state_t *tls, const char *sni)
 	/* application data can be sent/received */
 
 	/* free handshake data */
+	psRsaKey_clear(&tls->hsd->server_rsa_pub_key);
 //	if (PARANOIA)
 //		memset(tls->hsd, 0, tls->hsd->hsd_size);
 	free(tls->hsd);